CHAPTER XVI

ISOTHERMAL CURVES AND THE SPACE MODEL 272

Non-formation of double salts, 272. Formation of double salt, 273. Transition interval, 277. Isothermal evaporation, 278. Crystallization of double salt from solutions containing excess of one component, 280. Formation of mixed crystals, 281. Application to the characterization of racemates, 282. _Representation in space._ Space model for carnallite, 284. Summary and numerical data, 287. Ferric chloride--hydrogen chloride--water, 290. Ternary systems, 291. The isothermal curves, 294. Basic Salts, 296. Bi_{2}O_{3}--N_{2}O_{5}--H_{2}O, 298. Basic mercury salts, 301. Indirect determination of the composition of the solid phase, 302.